As I understand it, there are two privilege rings in most operating systems: kernel mode and user mode. Could an operating system developer create additional privilege rings, like a middleware mode or a kernel module mode?
Creating more privilege rings
63 Views Asked by Melab At
1
There are 1 best solutions below
Related Questions in OPERATING-SYSTEM
- the end of the I/O operation is notified to the system by an interrupt.how much system time do the mentioned operations occupy?
- Problem on CPU scheduling algorithms in OS
- OS-wide text autocomplete service with popup
- mkssecreenshotmgr taking a screenshot
- How to prevent app from crashing on android emulator
- Is there a function to end a child process?
- Swapping a healthy and unallocated partition in Windows 10
- ubuntu OS : Why my battery is completely drained of in just 2 hours in suspend mode
- 1 filenames = [] 2 ----> 3 for file in os.zipfile('images.zip'):
- Worth it to access data by blocks on modern OS/hardware?
- How does outlook disable screenshot
- How can I enable my app to access a specific partition directory for reading and writing without showing popup to user?
- Exception of type 'System.Exception' was thrown. Error in Cosmos Project
- Maximum CPU Voltage reading
- Java: get username from uid
Related Questions in KERNEL
- Simulate WeChat scanning short connection redirection, but the QQ display result is different from WeChat?
- Validating a client from kernel in Windows
- Yocto kernel patch fails with git am
- Nuke BlinkScript: Why does the convolution kernel scale down the image?
- EKS AMI kernel debug symbols
- Unexpected OS Shutdown
- create_ap wlan0: Could not connect to kernel driver
- QEMU i386 pmio addresses
- Simple programming of VGA cursor
- How to compile and install kernel modules with dependencies and device tree?
- android camera driver rotate 90°
- Is there any way to get the WiFi contention window (CW) min and max value in Linux 80211 subsystem?
- How to reduce cached memory used by Linux kernel on embedded linux platform
- How can I get current cpufreq in kernel code?
- Print Inode or file data, using path name
Related Questions in PRIVILEGE
- What's the least privileges of NetLocalGroupAddMembers?
- Active Directory group member not inhert privilege from group
- How to see all users who have same grant
- Separate database credentials for each rails daemon
- Call binary without elevated privilege
- Security risk in libweexjsc.so, where is the source code?
- HANA "create any" object privilege
- not be able to create Access Control Page
- Accessing underprivileged stack by weakening the CPL with RPL in intel microprocessor
- RPL of CS while transferring control to a conforming code segment in intel microprocessor
- How to set the Privilege for each control and page globally in ReactJs?
- Creating shortcut in user Start menu from elevated Inno Setup installer
- Oracle user does not get privilege from role
- How to privilege escalate www-data when you're logged in as www-data
- Access table user in sysdba privilege
Related Questions in USERSPACE
- Identical C code using identical user-space bluetooth library works fine on one Ubuntu 22.04 laptop and fails on another
- How do I use RDMA in the kernel so that I can communicate with user-space RDMA?
- fgets that doesn't stop at spaces or linebreaks
- How to implement syscall in XV6
- Non-root access to a wifi adapter via ioctl in Linux app - how to grant?
- Using I2C or SPI device via Linux Userspace I/O driver?
- I2C device drivers in userspace : mutex on ioctl and smbus address
- Userspace use Generic Netlink Library pass NLA_NESTED data to kernel error
- How to detect if `struct page` is backed by a file on a filesystem in Linux?
- AES-GCM with the Kernel Crypto API from Userspace
- how pass data from kernel space to user space - copy_to_user()
- How to send data from kernel to userspace through signals (send_sig_info)?
- UDP packet re-ordering in linux
- enable Dpdk application talk to Linux process
- kubernetes kube proxy mode(which one IPVS,iptables or userspace)
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
It depends on the processor architecture. IA-32 (and AMD64 too) actually support four privilege levels (rings) – ring 3 (usermode) and ring 0 (kernelmode). You can execute code on other rings (1 or 2) by manipulating the global/local descriptor table (GDT/LDT).
IMHO, hypervisors take advantage of the other ring levels for performance reasons (the virtual machine kernel executes on ring 1 instead of 0 and only privileged instructions that can be executed only on ring 0 are emuleated).